<html>
    <head>
        <meta charset="utf-8" />
        <title>cors</title>
    </head>
    <body>
        <script src="https://cdnjs.cloudflare.com/ajax/libs/fetch/2.0.4/fetch.min.js"></script>
        <script>
           fetch('http://127.0.0.1:3011/', {
               //method: 'PUT',
               //headers: {
               //    'X-Test-Cors': 'test'
               //}
           })
        </script>
        <!-- <script src="http://127.0.0.1:3011/"></script> -->
    </body>
</html>